Journal of Astronautics ›› 2021, Vol. 42 ›› Issue (11): 1427-1438.doi: 10.3873/j.issn.1000-1328.2021.11.009

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A Relative Imaging Time Coding based Genetic Algorithm for Agile Imaging Satellite Task Planning

HAN Peng, GUO Yan ning, LI Chuan jiang, LI Wen bo, MA Guang fu   

  1. 1. Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Beijing Institute of Control Engineering, Beijing 100190, China;3. Science and Technology on Space Intelligent Control Laboratory, Beijing 100190, China      
  • Received:2021-02-13 Revised:2021-03-19 Online:2021-11-15 Published:2021-11-15

Abstract: Based on the relative imaging time coding method, a novel adaptive genetic algorithm (RITC AGA) for imaging satellite task planning is proposed in this paper. Firstly, the objective function of satellite task planning is constructed by considering the observation profit of imaging point targets and the energy consumption during satellite attitude maneuver. Secondly, the optimal attitude transfer model between different targets is developed based on the linearized attitude dynamics model. Then, in order to ensure that the genetic algorithm has a complete search space for decision variables and improve the iteration efficiency, a relative imaging time encode and decode strategy is designed,which can be used in the situation of long term operation and multiple observable time window. Finally, the effectiveness and superiority of the proposed method are verified by the comparative simulation experiments under typical task planning examples.

Key words: Agile imaging satellite, Task planning, Optimal control, Relative imaging time coding, Genetic algorithm

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